Probing the early stages of shock-induced chondritic meteorite formation at the mesoscale

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Title: Probing the early stages of shock-induced chondritic meteorite formation at the mesoscale
Author(s): Rutherford, ME
Chapman, DJ
Derrick, JG
Patten, JRW
Bland, PA
Rack, A
Collins, GS
Eakins, DE
Item Type: Journal Article
Abstract: Chondritic meteorites are fragments of asteroids, the building blocks of planets, that retain a record of primordial processes. Important in their early evolution was impact-driven lithification, where a porous mixture of millimetre- scale chondrule inclusions and sub-micrometre dust was compacted into rock. In this Article, the shock compression of analogue precursor chondrite material was probed using state of the art dynamic X-ray radiography. Spatially-resolved shock and particle velocities, and shock front thicknesses were extracted directly from the radiographs, representing a greatly enhanced scope of data than could be measured in surface-based studies. A statistical interpretation of the measured velocities showed that mean values were in good agreement with those predicted using continuum-level modelling and mixture theory. However, the distribution and evolution of wave velocities and wavefront thicknesses were observed to be intimately linked to the mesoscopic structure of the sample. This Article provides the first detailed experimental insight into the distribution of extreme states within a shocked powder mixture, and represents the first mesoscopic validation of leading theories concerning the variation in extreme pressure-temperature states during the formation of primordial planetary bodies.
Publication Date: 30-May-2017
Date of Acceptance: 20-Feb-2017
URI: http://hdl.handle.net/10044/1/44870
DOI: https://dx.doi.org/10.1038/srep45206
ISSN: 2045-2322
Publisher: Nature Publishing Group
Journal / Book Title: Scientific Reports
Volume: 7
Copyright Statement: © British Crown Owned Copyright 2017/AWE. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Sponsor/Funder: AWE PLC
Engineering and Physical Sciences Research Council
Funder's Grant Number: 30266045/0
High-resolution X-Ray imaging of the mesoscale during dynamic loading: 1378728
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
X-RAY
POWDER MIXTURES
DEFORMATION
METAMORPHISM
SIMULATIONS
COMPRESSION
COMPACTION
Publication Status: Published
Article Number: 45206
Appears in Collections:Faculty of Engineering
Physics
Earth Science and Engineering
Plasma Physics
Faculty of Natural Sciences



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